README.md in redis-actionpack-5.2.0 vs README.md in redis-actionpack-5.3.0

@@ -27,11 +27,10 @@
 ActionController::Base.session_store = :redis_store,
   servers: %w(redis://localhost:6379/0/session),
   expire_after: 90.minutes,
   key: '_my_application_session',
   threadsafe: false,
-  signed: true,
   secure: true
 ```
 
 A brief run-down of these options...
 
@@ -42,12 +41,9 @@
 - **key** is the name of the cookie on the client side
 - **threadsafe** is for applications that run on multiple instances. Set
   this to `false` if you want to disable the global mutex lock on
   session data. It's `true` by default, meaning the mutex will be
   enabled.
-- **signed** uses signed/encrypted cookies to store the local session on
-  a client machine, preventing a malicious user from tampering with its
-  contents.
 - **secure** ensures HTTP cookies are transferred from server to client
   on a secure (HTTPS) connection
 
 ## Running tests